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Old 08-07-2010, 05:57 PM
98Ranger2.5 98Ranger2.5 is offline
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1988 F450 7.3L diesel charging system

Hi Im helping out a buddy trace out his charging system problem. he has a 1988 ford F450 diesel flatbed tow truck. he already put in a new Alt. regulator, batterys. still does not charge. im looking to see if anyone can help out with a wiring diagram for the charging system.
thanks in advance
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Old 08-07-2010, 06:08 PM
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Did you check the battery fuse?
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Old 08-07-2010, 06:16 PM
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HUM did not know there is one Where would it be located
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Old 08-07-2010, 10:43 PM
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It is in the dash fuse panel in the SD trucks, but in some cars it is under the hood. It is a larger fuse 60A or higher.
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Old 08-08-2010, 10:29 AM
98Ranger2.5 98Ranger2.5 is offline
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thanks JC but thiss truck is a 88 it does not have any big fuse like that. all the fuseable links though were checked. you wouldnt happen to know what the 4 pins on the voltage regulator go to.
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Old 08-08-2010, 10:29 AM
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